M 5.5 in Mexico on 31 Jul 2021 15:39 UTC
Shakemap
Tsunami

Event summary

This earthquake is expected to have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

Earthquake Magnitude: 5.5M
Depth: 10 Km
Lat/Lon: 27.5416 , -111.5183
Event Date: 31 Jul 2021 15:39 UTC
31 Jul 2021 08:39 Local
Exposed Population: 200000 people in MMI>=IV
170000 people within 100km
Source: NEIC us6000f109
Inserted at: 31 Jul 2021 17:10 UTC
INFORM Coping capacity of the alert score: 4.4 (Mexico)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)
GDACS score
NEIC 0 0
us6000f109 Scaled population (raster) 0  
  C1 shakemap -0.59  
  C2 shakemap 0.53  
  Country Vulnerability 0  
  INFORM_normalised 0.92  
Maximum expected impact using different data sources.

ShakeMap is a product of the USGS Earthquake Hazards Program in conjunction with the regional seismic networks. ShakeMaps provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.


Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1388624 0 31 Jul 2021 15:39 5.5M, 10km 4.13 less than 100 (in MMI>=VII) 00:15 NEIC
1388633 0 31 Jul 2021 15:39 5.5M, 10km 4.22 less than 100 (in MMI>=VII) 01:30 NEIC
The episode that generated the alert; the next major evaluations beyond 12 hours will not trigger additional alerts.
The episode that has the last updated information.
* The max MMI detected for sources having shakemaps;
** The population detected in MMI>=7 for episode with shakemap or in a 100km radius;
*** The tsunami max height.

Exposed population

The earthquake happened in Mexico ,of Sonora (population 1,983,593) . The alertlevel for this event is GREEN

Intensity Population
no people


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1388624 27.615/-111.508 5.5 10.0 4.12 31 Jul 2021 15:57 00:18 (new episode)
2 0 1388624 27.615/-111.508 5.5 10.0 4.126 31 Jul 2021 16:47 01:08 (upd of #1)
3 0 1388633 27.542/-111.518 5.5 10.0 4.219 31 Jul 2021 17:43 02:04 (new episode)
4 0 1388633 27.542/-111.518 5.5 10.0 4.219 01 Aug 2021 15:43 1d 00:04 (upd of #3)

Affected Provinces

Intensity Region Province Country Population
Sonora Mexico 210000 people
Baja California Sur Mexico 15000 people

Affected populated places. Areas of interest

Intensity Name Region Province Country City class Population Distance
San Carlos Sonora Mexico Village - 66 km
San Bruno Baja California Sur Mexico Village - 74 km
Guaymas Sonora Mexico City 100000 people 75 km
Santa Rosalía Baja California Sur Mexico Village 11000 people 78 km
Hacienda El Pardo Sonora Mexico Village - 80 km
Empalme Sonora Mexico City 38000 people 84 km
Las Delicias Baja California Sur Mexico Village - 85 km
Aguila Sonora Mexico Village - 91 km
Tastiota Sonora Mexico Village - 94 km
Maytorena Sonora Mexico Village - 97 km
Pitahaya Sonora Mexico Village - 99 km
Guásimas Sonora Mexico Village - 105 km
Rancho Los Gatos Sonora Mexico Village - 105 km
Liliba Sonora Mexico Village - 107 km
Potam Sonora Mexico Village 5800 people 110 km
San Rafael Sonora Mexico Village - 115 km
Oritz Sonora Mexico Village - 115 km
Cholay Sonora Mexico Village - 115 km
Oronio Sonora Mexico Village - 119 km
Sifón de los Pinos Sonora Mexico Village - 120 km
Colonia Militar Sonora Mexico Village - 127 km

see full list


Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Airports

Intensity Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft)
Punta Chivato PCV unknown 0
General Jose Maria Yanez International GYM 27 Civ. Paved Yes 7700
Punta Chivato Bulge 2 0
Santa Rosalia SRL unknown 0

Ports

Intensity Name LOCODE Country
San Marcos Island MXSMI Mexico
Guaymas MXGYM Mexico
Santa Rosalia MXSRL Mexico
Empalme Mexico

More information

For a full list of available products related to this event, please refer to the GDACS Resources page.